How come the entire Chinese team has the Li-ning paint stencil on their strings, but Cai/Fu have the Kayson paint stencil?
Cai/Fu had contract with Kason for their equipment before LN bought Kason. Esentially LN and Kason are one company now.
Li Ning bought Kason so Kason makes Li-Ning rackets. Both Kason and Li-Ning rackets are made in Kason factories. There are no differences - just different logos.